我在我的Android应用程序中使用水平进度条,我想改变它的进度颜色(默认为黄色)。我如何使用代码(而不是XML)做到这一点?
当前回答
在新版本的材料设计库中,一个不确定的线性进度指示器似乎可以被制作成多种颜色。
使进度条的动画类型连续可以实现这一点。
在具有此属性的布局中: 应用:indeterminateAnimationType 或者用这个方法编程: setIndeterminateAnimationType ()
更多信息请参考这里。
其他回答
很抱歉,这不是答案,但是是什么驱使需求从代码中设置它呢? 如果定义正确。setprogressdrawable应该工作
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@android:id/background">
<shape>
<corners android:radius="5dip" />
<gradient
android:startColor="#ff9d9e9d"
android:centerColor="#ff5a5d5a"
android:centerY="0.75"
android:endColor="#ff747674"
android:angle="270"
/>
</shape>
</item>
<item android:id="@android:id/secondaryProgress">
<clip>
<shape>
<corners android:radius="5dip" />
<gradient
android:startColor="#80ffd300"
android:centerColor="#80ffb600"
android:centerY="0.75"
android:endColor="#a0ffcb00"
android:angle="270"
/>
</shape>
</clip>
</item>
<item android:id="@android:id/progress">
<clip>
<shape>
<corners
android:radius="5dip" />
<gradient
android:startColor="@color/progress_start"
android:endColor="@color/progress_end"
android:angle="270"
/>
</shape>
</clip>
</item>
</layer-list>
我是如何在水平ProgressBar中做到的:
LayerDrawable layerDrawable = (LayerDrawable) progressBar.getProgressDrawable();
Drawable progressDrawable = layerDrawable.findDrawableByLayerId(android.R.id.progress);
progressDrawable.setColorFilter(color, PorterDuff.Mode.SRC_IN);
在新版本的材料设计库中,一个不确定的线性进度指示器似乎可以被制作成多种颜色。
使进度条的动画类型连续可以实现这一点。
在具有此属性的布局中: 应用:indeterminateAnimationType 或者用这个方法编程: setIndeterminateAnimationType ()
更多信息请参考这里。
对于水平风格的ProgressBar,我使用:
import android.widget.ProgressBar;
import android.graphics.drawable.GradientDrawable;
import android.graphics.drawable.ClipDrawable;
import android.view.Gravity;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LayerDrawable;
public void setColours(ProgressBar progressBar,
int bgCol1, int bgCol2,
int fg1Col1, int fg1Col2, int value1,
int fg2Col1, int fg2Col2, int value2)
{
//If solid colours are required for an element, then set
//that elements Col1 param s the same as its Col2 param
//(eg fg1Col1 == fg1Col2).
//fgGradDirection and/or bgGradDirection could be parameters
//if you require other gradient directions eg LEFT_RIGHT.
GradientDrawable.Orientation fgGradDirection
= GradientDrawable.Orientation.TOP_BOTTOM;
GradientDrawable.Orientation bgGradDirection
= GradientDrawable.Orientation.TOP_BOTTOM;
//Background
GradientDrawable bgGradDrawable = new GradientDrawable(
bgGradDirection, new int[]{bgCol1, bgCol2});
bgGradDrawable.setShape(GradientDrawable.RECTANGLE);
bgGradDrawable.setCornerRadius(5);
ClipDrawable bgclip = new ClipDrawable(
bgGradDrawable, Gravity.LEFT, ClipDrawable.HORIZONTAL);
bgclip.setLevel(10000);
//SecondaryProgress
GradientDrawable fg2GradDrawable = new GradientDrawable(
fgGradDirection, new int[]{fg2Col1, fg2Col2});
fg2GradDrawable.setShape(GradientDrawable.RECTANGLE);
fg2GradDrawable.setCornerRadius(5);
ClipDrawable fg2clip = new ClipDrawable(
fg2GradDrawable, Gravity.LEFT, ClipDrawable.HORIZONTAL);
//Progress
GradientDrawable fg1GradDrawable = new GradientDrawable(
fgGradDirection, new int[]{fg1Col1, fg1Col2});
fg1GradDrawable.setShape(GradientDrawable.RECTANGLE);
fg1GradDrawable.setCornerRadius(5);
ClipDrawable fg1clip = new ClipDrawable(
fg1GradDrawable, Gravity.LEFT, ClipDrawable.HORIZONTAL);
//Setup LayerDrawable and assign to progressBar
Drawable[] progressDrawables = {bgclip, fg2clip, fg1clip};
LayerDrawable progressLayerDrawable = new LayerDrawable(progressDrawables);
progressLayerDrawable.setId(0, android.R.id.background);
progressLayerDrawable.setId(1, android.R.id.secondaryProgress);
progressLayerDrawable.setId(2, android.R.id.progress);
//Copy the existing ProgressDrawable bounds to the new one.
Rect bounds = progressBar.getProgressDrawable().getBounds();
progressBar.setProgressDrawable(progressLayerDrawable);
progressBar.getProgressDrawable().setBounds(bounds);
// setProgress() ignores a change to the same value, so:
if (value1 == 0)
progressBar.setProgress(1);
else
progressBar.setProgress(0);
progressBar.setProgress(value1);
// setSecondaryProgress() ignores a change to the same value, so:
if (value2 == 0)
progressBar.setSecondaryProgress(1);
else
progressBar.setSecondaryProgress(0);
progressBar.setSecondaryProgress(value2);
//now force a redraw
progressBar.invalidate();
}
一个调用的例子是:
setColours(myProgressBar,
0xff303030, //bgCol1 grey
0xff909090, //bgCol2 lighter grey
0xff0000FF, //fg1Col1 blue
0xffFFFFFF, //fg1Col2 white
50, //value1
0xffFF0000, //fg2Col1 red
0xffFFFFFF, //fg2Col2 white
75); //value2
如果您不需要“次要进度”,只需将value2设置为value1。
在修改默认进度条的外观时遇到了同样的问题。这里有一些更多的信息,希望能帮助到人们:)
The name of the xml file must only contain characters: a-z0-9_. (ie. no capitals!) To reference your "drawable" it is R.drawable.filename To override the default look, you use myProgressBar.setProgressDrawable(...), however you need can't just refer to your custom layout as R.drawable.filename, you need to retrieve it as a Drawable:Resources res = getResources(); myProgressBar.setProgressDrawable(res.getDrawable(R.drawable.filename); You need to set style before setting progress/secondary progress/max (setting it afterwards for me resulted in an 'empty' progress bar)
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